/* =========================================================
   تارنورد پارس - Stylesheet اصلی
   فهرست:
   1. Reset & Base
   2. Tokens (رنگ‌ها، فونت، فاصله‌ها)
   3. Typography
   4. Layout Helpers
   5. Buttons
   6. Header
   7. Hero
   8. Services
   9. Benefits
   10. Projects
   11. About
   12. CTA
   13. Contact
   14. Footer
   15. Scroll Reveal Animations
   16. Responsive
   ========================================================= */

/* ---------- 1. Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body, h1, h2, h3, p, ul, figure { margin: 0; }
ul { padding: 0; list-style: none; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
input, textarea, select { font: inherit; }

/* ---------- 2. Tokens ---------- */
:root{
  /* رنگ‌ها */
  --color-bg: #0A0A0C;
  --color-bg-alt: #131316;
  --color-bg-elevated: #18181C;
  --color-border: rgba(245, 243, 238, 0.09);
  --color-border-strong: rgba(245, 243, 238, 0.16);
  --color-text: #F4F2EC;
  --color-text-muted: #A6A4A0;
  --color-text-dim: #77756F;
  --color-accent: #C9A24A;
  --color-accent-soft: rgba(201, 162, 74, 0.14);
  --color-accent-line: rgba(201, 162, 74, 0.35);

  /* فونت */
  --font-main: "Vazirmatn", "Segoe UI", Tahoma, Arial, sans-serif;

  /* فاصله‌گذاری */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.75rem;
  --space-lg: 3rem;
  --space-xl: 5.5rem;
  --space-xxl: 8rem;

  --radius-sm: 6px;
  --radius-md: 14px;
  --radius-lg: 24px;

  --container-w: 1160px;
  --transition: 0.35s cubic-bezier(.25,.8,.25,1);
}

/* ---------- 3. Typography ---------- */
body{
  font-family: var(--font-main);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.8;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { font-weight: 800; line-height: 1.3; letter-spacing: -0.01em; }

h1 { font-size: clamp(2.1rem, 4.4vw, 3.4rem); }
h2 { font-size: clamp(1.7rem, 2.8vw, 2.35rem); }
h3 { font-size: 1.15rem; font-weight: 700; }

.eyebrow{
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.02em;
  margin-bottom: var(--space-sm);
}
.eyebrow::before{
  content: "";
  width: 20px;
  height: 1px;
  background: var(--color-accent);
  display: inline-block;
}

.section-desc{
  color: var(--color-text-muted);
  font-size: 1.02rem;
  max-width: 46ch;
}

/* ---------- 4. Layout Helpers ---------- */
.container{
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}
.section-head{ margin-bottom: var(--space-lg); }

section { position: relative; }

.skip-link{
  position: absolute;
  right: -999px;
  top: 0;
  background: var(--color-accent);
  color: #17130a;
  padding: 0.6rem 1rem;
  border-radius: 0 0 8px 8px;
  z-index: 999;
  font-weight: 700;
}
.skip-link:focus{ right: 1rem; }

/* Focus visibility */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible{
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 5. Buttons ---------- */
.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.6rem;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.95rem;
  transition: transform var(--transition), background var(--transition), border-color var(--transition), color var(--transition);
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn-primary{
  background: var(--color-accent);
  color: #16130a;
}
.btn-primary:hover{ transform: translateY(-2px); background: #d9b360; }

.btn-outline{
  border-color: var(--color-border-strong);
  color: var(--color-text);
  background: transparent;
}
.btn-outline:hover{ border-color: var(--color-accent); color: var(--color-accent); transform: translateY(-2px); }

.btn-sm{ padding: 0.6rem 1.25rem; font-size: 0.85rem; }
.btn-lg{ padding: 1.05rem 2.2rem; font-size: 1.02rem; }
.btn-block{ width: 100%; }

/* ---------- 6. Header ---------- */
.site-header{
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 1.35rem 0;
  transition: background var(--transition), padding var(--transition), border-color var(--transition), backdrop-filter var(--transition);
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled{
  background: rgba(10, 10, 12, 0.78);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 0.9rem 0;
  border-color: var(--color-border);
}
.header-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}
.logo{
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.logo-mark{
  width: 10px; height: 10px;
  border-radius: 2px;
  background: var(--color-accent);
  transform: rotate(45deg);
  flex-shrink: 0;
}
.logo-text{
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: 0.01em;
  direction: ltr;
}
.logo-text em{
  font-style: normal;
  color: var(--color-accent);
  font-weight: 500;
}

.main-nav ul{ display: flex; gap: 2rem; }
.main-nav a{
  font-size: 0.95rem;
  color: var(--color-text-muted);
  transition: color var(--transition);
  position: relative;
}
.main-nav a:hover{ color: var(--color-text); }

.header-actions{ display: flex; align-items: center; gap: 1rem; }

.menu-toggle{
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 8px;
}
.menu-toggle span{
  width: 22px; height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.menu-toggle[aria-expanded="true"] span:nth-child(1){ transform: translateY(7px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:nth-child(2){ opacity: 0; }
.menu-toggle[aria-expanded="true"] span:nth-child(3){ transform: translateY(-7px) rotate(-45deg); }

.mobile-nav{
  display: none;
  max-height: 0;
  overflow: hidden;
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
  transition: max-height var(--transition);
}
.mobile-nav.is-open{ max-height: 400px; }
.mobile-nav ul{
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 1rem 1.5rem 1.5rem;
}
.mobile-nav a{
  display: block;
  padding: 0.85rem 0.25rem;
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-border);
}
.mobile-nav .btn{ margin-top: 0.75rem; width: 100%; border-bottom: none; }

/* ---------- 7. Hero ---------- */
.hero{ padding: var(--space-xxl) 0 var(--space-xl); overflow: hidden; }
.hero-inner{
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: var(--space-lg);
}
.hero-desc{
  color: var(--color-text-muted);
  font-size: 1.08rem;
  max-width: 52ch;
  margin: var(--space-sm) 0 var(--space-md);
}
.hero-actions{ display: flex; gap: 1rem; flex-wrap: wrap; }

.hero-visual{ display: flex; justify-content: center; }
.visual-glass{
  position: relative;
  width: 100%;
  max-width: 420px;
  aspect-ratio: 1/1;
  border-radius: var(--radius-lg);
  background: linear-gradient(155deg, rgba(255,255,255,0.04), rgba(255,255,255,0.01));
  border: 1px solid var(--color-border);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-svg{ width: 82%; height: 82%; }
.node-line{ stroke: var(--color-accent-line); stroke-width: 1; }
.node-core{ fill: var(--color-accent); }
.node-dot{ fill: var(--color-text); opacity: 0.55; }
.orbit-1{ transform-origin: 240px 240px; animation: spin 46s linear infinite; }
.orbit-2{ transform-origin: 240px 240px; animation: spin 32s linear infinite reverse; }
@keyframes spin{ to{ transform: rotate(360deg); } }

/* ---------- 8. Services ---------- */
.services{ padding: var(--space-xl) 0; }
.services-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
.service-card{
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  transition: border-color var(--transition), transform var(--transition), background var(--transition);
}
.service-card:hover{
  border-color: var(--color-accent-line);
  transform: translateY(-4px);
  background: var(--color-bg-elevated);
}
.service-icon{
  display: inline-flex;
  width: 44px; height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--color-accent-soft);
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}
.service-icon svg{ width: 22px; height: 22px; }
.service-card p{ color: var(--color-text-muted); margin-top: 0.5rem; font-size: 0.95rem; }

/* ---------- 9. Benefits ---------- */
.benefits{ padding: var(--space-xl) 0; background: var(--color-bg-alt); border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); }
.benefits-grid{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}
.benefit-index{
  display: block;
  font-size: 0.85rem;
  color: var(--color-accent);
  font-weight: 700;
  margin-bottom: 0.75rem;
  direction: ltr;
  text-align: right;
}
.benefit-item p{ color: var(--color-text-muted); font-size: 0.94rem; margin-top: 0.4rem; }

/* ---------- 10. Projects ---------- */
.projects{ padding: var(--space-xl) 0; }
.projects-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.project-card{
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-bg-alt);
  transition: transform var(--transition), border-color var(--transition);
}
.project-card:hover{ transform: translateY(-5px); border-color: var(--color-accent-line); }
.project-thumb{
  aspect-ratio: 4/3;
  position: relative;
  background: var(--project-gradient, linear-gradient(135deg, #1b1b1f, #262620));
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.project-thumb::after{
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(0deg, rgba(0,0,0,0.35), transparent 55%);
}
.project-thumb-mark{
  font-family: var(--font-main);
  font-weight: 800;
  font-size: 2.4rem;
  color: rgba(244,242,236,0.14);
  letter-spacing: 0.05em;
  direction: ltr;
}
.project-body{ padding: 1.4rem; }
.project-type{
  font-size: 0.78rem;
  color: var(--color-accent);
  font-weight: 700;
  margin-bottom: 0.35rem;
}
.project-body p{ color: var(--color-text-muted); font-size: 0.92rem; margin: 0.5rem 0 1rem; }
.project-link{
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--color-text);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  border-bottom: 1px solid var(--color-border-strong);
  padding-bottom: 2px;
  transition: color var(--transition), border-color var(--transition);
}
.project-link:hover{ color: var(--color-accent); border-color: var(--color-accent); }

/* ---------- 11. About ---------- */
.about{ padding: var(--space-xl) 0; }
.about-inner{ max-width: 760px; }
.about-text p{ color: var(--color-text-muted); font-size: 1.03rem; margin-top: var(--space-sm); }

/* ---------- 12. CTA ---------- */
.cta{
  padding: var(--space-xl) 0;
  background: radial-gradient(80% 140% at 50% 0%, var(--color-accent-soft), transparent 60%), var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.cta-inner{ text-align: center; max-width: 640px; margin: 0 auto; }
.cta-inner p{ color: var(--color-text-muted); margin: var(--space-sm) 0 var(--space-md); }

/* ---------- 13. Contact ---------- */
.contact{ padding: var(--space-xl) 0; }
.contact-inner{
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: var(--space-lg);
}
.contact-list{ margin-top: var(--space-md); display: flex; flex-direction: column; gap: 0.9rem; }
.contact-list li{ display: flex; gap: 0.75rem; align-items: baseline; font-size: 0.98rem; }
.contact-label{ color: var(--color-text-dim); min-width: 64px; font-size: 0.85rem; }
.contact-list a{ transition: color var(--transition); }
.contact-list a:hover{ color: var(--color-accent); }

.social-links{ display: flex; gap: 1.25rem; margin-top: var(--space-md); }
.social-links a{ font-size: 0.88rem; color: var(--color-text-muted); border-bottom: 1px solid var(--color-border-strong); padding-bottom: 2px; transition: color var(--transition), border-color var(--transition); }
.social-links a:hover{ color: var(--color-accent); border-color: var(--color-accent); }

.contact-form{
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}
.form-row{ display: flex; flex-direction: column; gap: 0.5rem; }
.form-row label{ font-size: 0.88rem; color: var(--color-text-muted); }
.form-row input,
.form-row textarea,
.form-row select{
  background: var(--color-bg);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  padding: 0.75rem 0.9rem;
  color: var(--color-text);
  transition: border-color var(--transition);
}
.form-row input:focus,
.form-row textarea:focus,
.form-row select:focus{ border-color: var(--color-accent); outline: none; }
.form-row textarea{ resize: vertical; min-height: 100px; }
.form-status{ font-size: 0.85rem; color: var(--color-accent); min-height: 1em; }

/* ---------- 14. Footer ---------- */
.site-footer{ border-top: 1px solid var(--color-border); padding-top: var(--space-lg); }
.footer-inner{
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: var(--space-md);
  padding-bottom: var(--space-lg);
}
.footer-brand p{ color: var(--color-text-muted); margin-top: 0.6rem; font-size: 0.92rem; max-width: 32ch; }
.footer-nav, .footer-contact{ display: flex; flex-direction: column; gap: 0.7rem; }
.footer-nav a, .footer-contact a{ color: var(--color-text-muted); font-size: 0.92rem; transition: color var(--transition); }
.footer-nav a:hover, .footer-contact a:hover{ color: var(--color-accent); }

.footer-bottom{
  border-top: 1px solid var(--color-border);
  padding: 1.25rem 1.5rem;
  text-align: center;
}
.footer-bottom p{ color: var(--color-text-dim); font-size: 0.85rem; }

/* ---------- 15. Scroll Reveal ---------- */
/*
  محتوا به‌صورت پیش‌فرض همیشه کاملاً نمایان است.
  حالت مخفی/انیمیشن Reveal فقط زمانی فعال می‌شود که کلاس "js" روی html
  توسط اسکریپت داخل head اضافه شده باشد (یعنی جاوااسکریپت واقعاً در حال اجراست).
  این یعنی اگر main.js به هر دلیلی بارگذاری نشود، هیچ متنی مخفی نمی‌ماند.
*/
.reveal{
  opacity: 1;
  transform: none;
}

html.js .reveal{
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
html.js .reveal.is-visible{
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  html.js .reveal{ opacity: 1; transform: none; transition: none; }
  .orbit-1, .orbit-2{ animation: none; }
  .btn, .service-card, .project-card{ transition: none; }
}

/* ---------- 16. Responsive ---------- */
@media (max-width: 1024px){
  .services-grid{ grid-template-columns: repeat(2, 1fr); }
  .benefits-grid{ grid-template-columns: repeat(2, 1fr); }
  .projects-grid{ grid-template-columns: repeat(2, 1fr); }
  .contact-inner{ grid-template-columns: 1fr; }
  .footer-inner{ grid-template-columns: 1fr 1fr; }
}

@media (max-width: 860px){
  .hero-inner{ grid-template-columns: 1fr; }
  .hero-visual{ order: -1; max-width: 320px; margin: 0 auto; }
  .main-nav{ display: none; }
  .menu-toggle{ display: flex; }
  .mobile-nav{ display: block; }
}

@media (max-width: 600px){
  .services-grid{ grid-template-columns: 1fr; }
  .benefits-grid{ grid-template-columns: 1fr; }
  .projects-grid{ grid-template-columns: 1fr; }
  .footer-inner{ grid-template-columns: 1fr; text-align: center; }
  .footer-nav, .footer-contact{ align-items: center; }
  .hero-actions{ flex-direction: column; align-items: stretch; }
  .header-inner{ gap: 0.75rem; }
}